| Stepper Motor Controller…. (24 Pins)
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LS7290, LS7290-S, LS7290-TS NEW!
Last Update: 06/16/09 |
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Controls two-phase Bipolar
and four-phase Unipolar motors |
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Inexpensive replacement for L297. |
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Direct interface to L298 for Bipolar motors |
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Interface to four AND Gates driving four N-Channel MOSFET's for Unipolar motors |
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Programmable step sizes: Full and 1/2, *1/4, *1/8, *1/16, *1/32
* Current feedback control not available for microsteps. |
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Nominal clock frequency: 8MHz |
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Maximum stepping rate: greater then 30k per second. |
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Programmable inter-step blanking delays:
1.25us, 2.5us, 3.75us and 5us at 8Mhz. |
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H-bridge PWM resolution: 0.39% |
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Two PWM and Four Phase outputs for H-Bridge control. |
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On-chip Crystal Oscillator, RC Oscillator or External source,
controls Step Frequency and Duty Cycle. |
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Supply voltage: 3V to
5.5V |
| Stepper Motor Controller…. (20 Pins; 20 Pins)
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LS8297, LS8297-S, LS8297-TS NEW!
LS8297CT, LS8297CT-S, LS8297CT-TS
Last Update: 04/20/09 |
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Low cost, low current, pin-compatible replacement for L297.
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Torque Ripple Compensated half-steps – LS8297CT |
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Controls two-phase Bipolar and four-phase Unipolar motors |
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Interface to four AND Gates driving four N-Channel MOSFET's for Unipolar motors |
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Normal/wave drive |
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PWM chopper circuit for current control |
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Two over current sense comparators with external references input |
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All inputs and outputs TTL/CMOS compatible (TTL for 5V operation) |
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Supply current < 400uA |
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Supply voltage: 4.75 to 7V |
| Stepper Motor Controller…. (24 Pins)
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LS8397, LS8397-S, LS8397-TS NEW!
Last Update: 04/21/09 |
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Low cost, low current, pin-compatible replacement for L297.
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L297 operating modes with added functions:
- Selectable Torque Ripple Compensation MODE
- Selectable Holding Torque MODE
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Other features same as LS8297 |
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